Search for Pair Production of Scalar Top Quarks Decaying to a τ Lepton and a b Quark in p p ¯ Collisions at s = 1.96 TeV

Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland.
Physical Review Letters (Impact Factor: 7.51). 08/2008; 101(7):071802. DOI: 10.1103/PhysRevLett.101.071802
Source: PubMed


We search for pair production of supersymmetric top quarks (t over1), followed by R-parity violating decay t over1-->taub with a branching ratio beta, using 322 pb(-1) of pp over collisions at sqrt s=1.96 TeV collected by the upgraded Collider Detector at Fermilab. Two candidate events pass our final selection criteria, consistent with the standard model expectation. We set upper limits on the cross section sigma(t over1t over1) x beta2 as a function of the top-squark mass m(t over1). Assuming beta=1, we set a 95% confidence level limit m(t over1)>153 GeV/c2. The limits are also applicable to the case of a third-generation scalar leptoquark (LQ3) decaying LQ3-->taub.

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Available from: Peter Mastin Mcintyre, Aug 18, 2014
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